Conical spirally-wound roller.



No. 863,729. 7 PATENTED) AUG. 20, 1907.

G. S. LOGKWOOD. GONIGAL SPIRALLYWOUND ROLLER.-

.APPLIOATION FILED NOV. 22, 1906.

2 SHEETS-SHEET 1.

No 868,729. PATENTED AUG. 20, 1907. 0. shLocKwoon.

OONIGAL SPIRALLY WOUND ROLL ER.

APPLICATION FILED NOV. 22. 1906.

2 SHEETS-SHEET Z.

UNrrnn srarns CHARLES S. LOOKWOOD, OF

COMPANY, OF HARRISON, NEW

arena ent ies.

CONICAL SPIRALEY-WO UND ROLLER.

Specification of Letters Patent.

Patented Aug. 20, 1907.

'Application filed November 22, 1906, Serial No, 3'l4,557.

To all whom it may concern:

Be it known that I, CHARLES S. LOCKWOOD, a citizen of the United States, residing at 289 Market street, Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Conical Spirally-Wound Rollers, fully described and represented in the following specification and the ee companying drawings, forming a part of the same.

The object of this invention is to furnish a tapering roll of elastic character suitable foruse in a roller bearing to support a conical or tapering journal.

Such a roll may be formed of a spirally wound strip of elastic metal, but as the inclination of the coils in such a roll increases progressively toward the smaller end of the roll, the strip or blank requires, for a roll with conical surface, a progressively increasing curvature toward one end where it forms the smaller end of the roll.

Such tapering rolls when properly arranged within the casing of a roller bearing, serve not only to support the load but to prevent end movement of the journal within its casing, the elasticity of such rolls serving to diminish the wear between the parts by compensating for inequalities of the supporting surfaces.

'Fig.

The invention will be understood by reference to the annexed drawing, in which- I Figure l is a side view of a tapering roll formedfrorn a spirally wound stripj Fig. 2 is a View of the larger end of such roll with an integral'lug upon the strip closing the central hole; Fig. 3 is a diagram showing the mandrcl with a suitably curved strip partially wound to form a tapering roll; Fig. 4 is a diagram showing a tapering roll wound from a straight blank; Fig. 5 isa diagram showing a stepped roll wound from a straight blank; and Fig. 6 is a diagram illustrating the development of the curve for shaping the blankstrips with suitable lateral curvature.

p a, a, a a", a, 0 of, a, a designate coils of the spirally wound rollshown in Fig. l.,'thc coils being formed from a s'trip' of uniform width and thus having a uniform pitch; but the inclination of the coils successively increasing toward the smaller end of the roll because of the diminution of the diameter toward that end.

The progressive inclination of the coils is very clearly indicated by dotted lines f extended from the coils in 3, such dotted lines converging and not standing parallel, as do the corresponding dotted lines g applied to the successive coils in Fig. 5.

If a straight blank of uniform width be wound upon the tapering mandrel b shown in Fig. 3, the spiral'inclithe several nation of the coils will be progressive and the coils will be progressively separated toward the larger end of the roll, as shown in Fig 4; or the coils, if wound in contact with one another, would not form a conical surface but a spirally stepped surface, as shown in Fig. 5. Neither of the forms shown in Fig. 4 or Fig. tinuous conical bearing surface. I

To form the continuous conical surface indicated in Figs. 1 and 3, the blank is formed with a lateral curvature increasing progressively toward one end, which forms'the smaller end of the roll, as indicated in Fig. 6, where the lateral curvature is indicated by a spiral line 0. The curvature of such spiral is designed in accordance with the width of the strip and the required taper for the roll, and it then compensates for the increasing inclination of the coils toward the smaller end. By the use of such a laterally curved strip with curvature increasing progressively toward one end, the exterior of the roll, when wound by machinery of sufficient strength, presents a truly conical surface that can be used as an elastic roll in a roller bearing without grinding or turning the surface to make it conical.

The laterally curved strip 0 is shown provided with an outwardly projecting lug d at one end which is grasped in winding the strip'on the mandrel, and is proportioned to close the bore of the roll at the larger. end so that such tapering rolls may when required be rotated. with their larger ends inhontact. I The ends of the roll are shown square with its axis in Fig. 1, thus necessitating a chamfering or beveling of the edge of the blank at each end, as indicated by the dotted line e upon oneend of the blank, and the sloping edge f at the opposite end where the lateral lug is made integral with the blank. With such a blank wound upon a suitable tapering mandrel, a roll with regular tapering or conical surface is produced and the ends square with its axis, and the lug d may, by suitable tools, be bent to close the hole at the larger end. If preferred, a blank without the lateral bevel at the ends may be used in forming 5 would afford a coni the roll, and the ends subsequently sawed or turned 05 square with the axis.

Where the lug d is used to close the end of the roll, such end is ground or turned so as,to give the lug a slightly convex surface, as indicated at d in Fig. 1, so

. that the larger end of two.rolls may rotate smoothly in contact with one another, as is sometimes required in roller-bearings employing such rolls.

Having thus set forth the nature of the invention what is claimed herein is: p I 1. A tapering roll having lts body formed of a spirally wound strip with increasing lnclinutlon of the coils toward the smaller end of the roll.

2. A tapering roll having its body formed of a spirally wound strip with Increasing inclination of the coils toward the smaller end of the roll, and having an integral in upon the strip at the larger end of the rnll bent to close the opening of the roll ntsueh end.

3. A tapering roll having its body formed of :1 spirally wound curved strip of progressively increasing curvature toward the smaller end of the roll.

4. A tapering roll having its body formed 01 a spirally wound curved sirip ufprogressively increasing curvature inward the smaller end of the roll, the striplmving at one 10 end a lateral lug for closing the ends of the finished roll.

in testiumny whereof I have hereunto set my hund in the presence of two suhserihing witnesses,

CHARLES S, LOCKWOOD,

Witnesses CHARLES W. Yoss, )IAX ll. LEMELL. 

